System Hardening

System hardening is the process of making a computer or server more secure by reducing security vulnerabilities. This usually means removing unnecessary software, disabling unused features, and limiting the number of ways users can access the system. The idea is simple: the fewer unnecessary components a system has, the fewer opportunities there are for something to go wrong.

Common hardening steps include enabling a firewall, using strong passwords, installing software updates, disabling guest accounts, and changing default settings that could be exploited. Administrators may also restrict remote access, require multi-factor authentication, and enable logging to track suspicious activity. Whether it is a personal PC, a business server, or a cloud system, a little hardening can go a long way toward improving security.

First Published: 2006
Last Updated: March 16, 2026